Abstract
Monitoring of environmental pollution can be carried out in the leaching process to determine the quality of sediment. This study modified the Tessier method leaching process using an optimized microwave. This study reported the effect of radiation contact time and microwave power in the microwave Tessier method based on their level of accuracy and precision to the analysis of Fe in sediment. After optimizing the microwave Tessier method, we continued using this optimization to determine pollution status using the Contamination Factor (CF) values. The results showed the time of contact of the radiation and microwave power gave an influence in the optimized Tessier analysis of Fe in sediment. The optimized conditions were in the fraction 1 (power radiation: 10%; time: 2 minutes), fraction 2 (power radiation: 30%; time: 3 minutes), fraction 3 (power radiation: 50%; time: 2 minutes), fraction 4 (power radiation: 50%; time: 3 minutes). The microwave Tessier method produced the recovery percentage of 94.11%. Fe concentration in sediments showed in the non-resistant fraction had a range between 537.6 mg/kg - 575.9 mg/kg, whereas Fe concentrations in the resistant fraction ranged from 3161.6 mg/kg - 10067.2 mg/kg. The results of CF values were obtained at 1.933-1.961, indicating the moderate contamination status in the Gulf of Prigi.
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